docstr: Test init rpn head.
docstr_tok: ["Test","init","rpn","head","."]
code: def test_init(self):
      """Test init rpn head."""
      rpn_head = EmbeddingRPNHead(
          num_proposals=100, proposal_feature_channel=256
      )
      rpn_head.init_weights()
      self.assertTrue(rpn_head.init_proposal_bboxes)
      self.assertTrue(rpn_head.init_proposal_features)
  
file_path: mmdetection/tests/test_models/test_dense_heads/test_embedding_rpn_head.py
imports: from unittest import TestCase
  import pytest
  import torch
  from mmengine.structures import InstanceData
  from mmdet.models.dense_heads import EmbeddingRPNHead
  from mmdet.structures import DetDataSample
label_desc: Use image node_id 1 for calling the TestEmbeddingRPNHead obj's underlying member method code with example usage: obj.test_init() without return types